| 摘要 |
The present invention is for a lighting means having light emitting diodes. The invention is primarily intended to be used for light signals, e.g. traffic signals. The object of the present invention is a lighting means of the above mentioned king having light emitting diodes which are arranged in rows and a lens to obtain the desired light pattern. The lighting means comprises a lens (1) and a number of light emitting diodes (3) which are mounted onto the same plate or circuit card (4). The device is enclosed in a common outer enclosure or housing (3). The lens is based upon a cylindrical structure. The inner surface which faces the light emitting diodes is divided into several bands (5) having a linear lens structure where there is one band corresponding to each row of the light emitting diodes. The band (5) is then divided into nonspherical subsurfaces (11, 12, 13, 14). |
